You have recently enabled TLS security on your Web application, as well as HSTS to ensure that unencrypted traffic on port 80 is now forced to use the TLS port 443. However, now your application server cannot communicate with your Web server. It worked before when everything was unsecurely using port 80. What do you think the problem is, and how can you fix it?
The problem most probably would be that the protocol used by the web application and the web server is not matching especially the TLS protocol. other issue might be that the server certificate is not present which is used to identify the server by the client web server.
These issues can be resolved by using the matching supported protocol in both sides and also using a signed server certificate to communicate with the client webserver, this certificate can be created.
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